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exr: write support and more

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- Added support for writing EXR files
- Large image support (tested with 32GiB 16-bit image)
- OpenEXR multithreaded read/write support through the use of line blocks
- Build option to enable conversion to sRGB when read (disabled by default)
- Multi-view image reading support
- Options support: Size, ImageFormat, Quality, CompressRatio
- Metadata write/read support via EXR attributes

The plugin is now quite complete. It should also work on KF5 (not tested): if there is the will to include this MR also on KF5, let me know and I will do all the necessary tests.
This commit is contained in:
Mirco Miranda
2023-09-17 08:07:47 +00:00
committed by Albert Astals Cid
parent 6a51407556
commit 7899c27a80
9 changed files with 793 additions and 93 deletions
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29
src/imageformats/scanlineconverter.cpp
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@ -15,13 +15,15 @@ ScanLineConverter::ScanLineConverter(const QImage::Format &targetFormat)
ScanLineConverter::ScanLineConverter(const ScanLineConverter &other)
: _targetFormat(other._targetFormat)
, _colorSpace(other._colorSpace)
, _defaultColorSpace(other._defaultColorSpace)
{
}
ScanLineConverter &ScanLineConverter::operator=(const ScanLineConverter &other)
{
this->_targetFormat = other._targetFormat;
this->_colorSpace = other._colorSpace;
_targetFormat = other._targetFormat;
_colorSpace = other._colorSpace;
_defaultColorSpace = other._defaultColorSpace;
return (*this);
}
@ -40,9 +42,19 @@ QColorSpace ScanLineConverter::targetColorSpace() const
return _colorSpace;
}
void ScanLineConverter::setDefaultSourceColorSpace(const QColorSpace &colorSpace)
{
_defaultColorSpace = colorSpace;
}
QColorSpace ScanLineConverter::defaultSourceColorSpace() const
{
return _defaultColorSpace;
}
const uchar *ScanLineConverter::convertedScanLine(const QImage &image, qint32 y)
{
auto colorSpaceConversion = isColorSpaceConversionNeeded(image, _colorSpace);
auto colorSpaceConversion = isColorSpaceConversionNeeded(image);
if (image.format() == _targetFormat && !colorSpaceConversion) {
return image.constScanLine(y);
}
@ -54,7 +66,11 @@ const uchar *ScanLineConverter::convertedScanLine(const QImage &image, qint32 y)
}
std::memcpy(_tmpBuffer.bits(), image.constScanLine(y), std::min(_tmpBuffer.bytesPerLine(), image.bytesPerLine()));
if (colorSpaceConversion) {
_tmpBuffer.setColorSpace(image.colorSpace());
auto cs = image.colorSpace();
if (!cs.isValid()) {
cs = _defaultColorSpace;
}
_tmpBuffer.setColorSpace(cs);
_tmpBuffer.convertToColorSpace(_colorSpace);
}
_convBuffer = _tmpBuffer.convertToFormat(_targetFormat);
@ -72,12 +88,15 @@ qsizetype ScanLineConverter::bytesPerLine() const
return _convBuffer.bytesPerLine();
}
bool ScanLineConverter::isColorSpaceConversionNeeded(const QImage &image, const QColorSpace &targetColorSpace) const
bool ScanLineConverter::isColorSpaceConversionNeeded(const QImage &image, const QColorSpace &targetColorSpace, const QColorSpace &defaultColorSpace)
{
if (image.depth() < 24) { // RGB 8 bit or grater only
return false;
}
auto sourceColorSpace = image.colorSpace();
if (!sourceColorSpace.isValid()) {
sourceColorSpace = defaultColorSpace;
}
if (!sourceColorSpace.isValid() || !targetColorSpace.isValid()) {
return false;
}